Table 2. Significantly (Z score [Z] > 5) negative F3 statistics for both hybrids examined and associated source populations, group according to ADMIXTURE K6 results (Is.americana = REV, POW; ML americana = CHI, MAK; Is.caurina = QCI, ADM; ML caurina = PNW, COL - where Is. indicated island and ML indicated mainland or continental localities). SE = standard error.